<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8"/>
    <title>回顾一个DOM操作</title>
    <style>
        .demo {
            background-color: orange;
        }
    </style>
</head>
<body>
<button id="btn">点我创建一个输入框</button>

<script type="text/javascript">
    const btn = document.getElementById('btn')
    btn.onclick = () => {
        const input = document.createElement('input')

        input.className = 'demo'
        input.value = 99
        input.onclick = () => {
            alert(1)
        }

        document.body.appendChild(input)

        input.focus()
        // input.parentElement.style.backgroundColor = 'skyblue'
        console.log(input.parentElement)

    }
</script>
</body>
</html>
